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At the end of their slender snouts, echidnas have tiny mouths and toothless jaws. They use their long, sticky tongues to feed on ants, termites, worms, and insect larvae.
Since they have no teeth, echidnas break their food down with hard pads located on the roof of the mouth and back of the tongue. Part of this might be due to their enlarged neocortex, which makes up half of the echidna's brain (compare this to about 30 percent in most other mammals and 80 percent in humans).* ***It was long thought that echidnas didn't enter rapid eye movement (REM) sleep at all, the type of sleep associated with dreaming in humans. But recently researchers found echidnas will experience REM sleep if they're at the right temperature. They enter REM sleep at around 25 °C (77 °F), but not at higher or lower temperatures.10. *Bradiopsylla echidnae, the echidna flea, is thought to be the world's largest flea at 4 mm (0.15 inches) long. If you're curious about what the echidna's penis looks like (and really, who isn't? ), you can find photos here and watch a video here.4. A strange process marks the start of echidna breeding season. Some climbers who are known for their regular practice of free solo climbing include: Hansjörg Auer, John Bachar, Patrick Berhault, Thomas Bubendorfer, Matt Bush, Renaldo Clarke, Peter Croft, Steph Davis, Bill Denz, Tim Deroehn, Catherine Destivelle, Patrick Edlinger, Eric Escoffier, Dan Goodwin, Mike Graham, Wolfgang Güllich, Colin Haley, Derek Hersey, Alex Honnold, Alexander Huber, Jimmy Jewell, Eric Jones, Kevin Jorgeson, Ally Law, Matt Lloyd, Dave Mac Leod, Dan Osman, Dean Potter, Paul Preuss, Andreas Proft, Herbert Ranggetiner, Michael Reardon, Alain Robert, Tobin Sorenson, Will Stanhope, Ueli Steck, Slavko Svetičič, Miroslav Šmíd, Akihira Tawara, John Yablonski, Maurizio Zanolla, and Brad Gobright.
Some climbers who occasionally or rarely free solo climbed, but have been influential to the practice, include: Pierre Allain, Henry Barber, Lynn Hill, Ron Kauk, Jean-Christophe Lafaille, John Long, Dave Mac Leod and Reinhold Messner.
Echidnas have the lowest body temperature of any mammal, 32__°__C (89__°__F).
Males alternate the heads they use between matings.
The last one remaining gets to mate with the female.
Male echidnas may also mate with hibernating females.
When the female is finally ready to mate, the males dig a trench in the ground around her.